This document discusses ABB's OneFit retrofit solution for replacing aging circuit breakers. OneFit allows circuit breakers to be replaced with new technology while minimizing modifications to existing switchgear panels. It can be installed internally or externally with different package options. Key benefits include reduced downtime, improved safety, use of standard parts, and upgrading to current standards. OneFit offers flexibility in circuit breaker models and accessories and can serve as an intermediate solution until a full panel replacement is needed.

1. 2013
ABB Retrofit and OneFit
© ABB Group
November 4, 2013 | Slide 1

2. OneFit
Definition: “Retrofit”
- Refers to the addition of new technology or features to older systems
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Benefits of Retrofit
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Saving on CAPEX while benefiting from new technologies
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Optimization of existing plant components
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Adaptation of the plant for new or changed products
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Increase in piece number and cycle time
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Guaranteed spare parts availability
© ABB Group
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3. Circuit Breaker Retrofit
Pre-requisites for Retrofit
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Condition of Switchboard: “Assessment of Equipment and Network Dependability”
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Are the bus zones/bus bars insulation and integrity acceptable
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Is the Panel metal work and framework acceptable
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Are the spouts/bushings integrity acceptable i.e. heat stress etc.
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Economical Viability to “Retrofit” versus “New” versus “Criticality”
© ABB Group
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4. Circuit Breaker Retrofit
Technical solutions
Conversion
Roll-in
Replacement
Retrofill
Hard-bus retrofill
Cradle-in cradle
Interchangeable with…
Original Apparatus
Original Components
© ABB
04/11/2013 - Slide 4
New Equipment
New Device
Adaptation system
New frame/cassette

5. Circuit Breaker Retrofit
Roll in Replacements – Vertical Connection (Typically Oil)
Reyrolle LMT
© ABB Group
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Hawker Siddeley HG12
Westinghouse J18 and J22

6. Circuit Breaker Retrofit
Roll in Replacements – Horizontal Connection (Typically SF6)
Siemens (H515)
© ABB Group
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Calor Emag

7. OneFit
General Configuration
© ABB Group
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8. OneFit
Solution Benefits
Maintenance and repair:

the Down time to install one unit is 8 to 10 hours depending on the amount of
wiring required
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OneFit have all standard spare parts with all the benefits in terms of delivery
time and price
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equipment and spare parts are interchangeable with new ABB extension
panels and additional switchgear
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same operational interface and maintenance approach for the equipment
installed in OneFit and new ABB panels
Modernization Process:

The use of standard breakers makes them ready without any
modification for Future ABB replacement switchgear, providing
an optimized investment for the next substation renewal.
© ABB Group
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| Slide

9. OneFit
Solution Benefits
Safety upgraded:

the original shutter system and all the relevant interlocking are replaced with
new standard ones installed from the factory on the OneFit system
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shutter and circuit breaker movement are interlocked to enable all necessary
safety features

the dielectric properties are increased thanks to the installation of a new
insulation plate
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depending on which OneFit package is chosen, apparatus racking behind a
closed door and remote racking are available
Standards:

OneFit solutions are type tested according to latest IEC
Standards: 62271-1 (for the frame) and 62271-100 (for the
circuit breaker) when the original panel is provided to perform
the tests. Otherwise ABB can provide a technical extension certificate.
© ABB Group
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10. OneFit
Solution Overview
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Hard-bus Retrofill design concept
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Embedded by integrally safe plug-in technology
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Horizontal Racking only
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Minimum panel width 550mm (Cassette is 535mm wide)
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Minimum modification to existing panel
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Minimal downtime to install
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Allows wide range of new apparatus
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Improved Operator safety options
© ABB Group
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November Year
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11. OneFit
Configuration 1 – (Internal to panel)
© ABB Group
November 4, 2013 | Slide 11

12. OneFit
Configuration 2 – (External to panel)
© ABB Group
November 4, 2013 | Slide 12

13. OneFit
Packages
Basic Kit -No Door
© ABB Group
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| Slide 13
Arc Contained Door
Motor Racking
Protection In Built

14. OneFit: Apparatus range
Benefit of the widest apparatus range and accessories
HD4, VD4, eVD4, VM1, VSC
Remote racking options
© ABB
04/11/2013 - Slide 14

15. OneFit
Engineering Tool – Copper design evaluation
3D
sketch environment to
evaluate new solutions
from case main
dimensional data

©
ABB Group
November
4, 2013 | Slide 15

16. © ABB Group
November 4, 2013 | Slide 16